This particular submarine may offer some reprieve from the april fool's joke: https://en.wikipedia.org/wiki/Gotland-class_submarine https://en.wikipedia.org/wi

This particular submarine may offer some reprieve from the april fool's joke: https://en.wikipedia.org/wiki/Gotland-class_submarine https://en.wikipedia.org/wiki/Gotland-class_submarine Which innovately uses the very classic stirling engine, an engine which operates on the sole basis of heat differences, no internal combustion. As I understand it these can be more silent than nucular submarines, which require pumps and such to avoid nucular meltdown, but I am no expert on the intricacies of submarine detection